....there are no regular Russian troop in Ukraine :-) Advisors, some volunteers - yes, but on the other side there are many NATO advisors and volunteers from West and nobody cries about that.
Have you considered that people are "crying" about Russians in Ukraine because 1) they are the invaders and 2) they deny any direct involvement. And people are NOT crying about "NATO advisors and volunteers from West" because 1) Ukraine are the defenders trying to stop invaders and 2) no one is denying that Ukraine is getting outside help to repel invaders.